Combined lock and latch



W 23, 1936- J. KUBINA v COMBINED LOCK AND LATCH Filed July 11, 1934 3Sheets-Sheet l Jan. 21, 1936. J, K N 2,028,672

COMBINED LOCK- AND LATCH Filed July 11, 1954- s Sheets-Sheet 2 49 7 I asv I John Kgbina.

Jan. 21, 193%.. J. KUBINA I 2,028,672

" COMBINED LOCK AND LATCH Filed July 11, 1934 5 Sheets-Sheet 3 JohnJfiubima- Patented Jan. 21, 1936 UNITED STATES PATENT OFI COMBINED LOCKAND LATCH Application July 11, 1934, Serial No. 734,681

1 Claim.

This invention relates to certain new and useful improvements incombined locks and latches adapted to be employed upon closures forlocking the same in closed position.

The primary object of this invention is to provide a fool-proof lockhaving a pair of key operated safety catches for holding the bolt of thelock in its locked position whereby picking of the look by anunauthorized person may be prevented.

A further object of this invention is to provide a lock of the abovementioned character having a sliding bolt and a knob operated latch andmeans operated by the latch knob for locking the bolt in a closedposition.

A still further object of this invention is to provide a lock of theabove mentioned character having a spring projected bolt capable ofbeing retracted by means of a key which requires both turning and axialmovement, for releasing the locking bolt whereby it may be retracted bythe turning movement of the key.

A still further object of this invention is to provide a combined lockand latch including a key operated bolt and a latch and a knob operatedbolt and means connected to the knob operated bolt when the same is inits extended position for looking or unlocking key operated meansassociated with the locking bolt.

Other objects and advantages of the invention will become apparentduring the course of the following description, taken with the drawingsand wherein,

Figure 1 is a top elevational view of the lock embodying this inventionillustrating the cover plate removed for the purpose of more clearlydisclosing the lock structure and as illustrated the locking bolt is inits retracted position and the latch bolt is in its normal position;

Figure 2 is a top elevational view of the lock similar to Figure 1showing the latch bolt in its normal position and the locking boltpartially projected;

Figure Bis a top elevational view of the lock structure illustrating thelatch bolt retracted and the locking bolt fully extended; Figure 4 is atop elevational View of the lock structure illustrating some of theelements partly in cross-section to more clearly show the details ofconstruction;

Figure 5 is a horizontal cross-sectional view taken on lines 5-5 ofFigure 1, looking in the direction of the arrows illustrating thelocking bolt in its retracted position and showing one of the catchesfor retaining the bolt and further showing the openings in the bolt forbeing engaged by the bolt catch; 7

Figure 6 is a horizontal cross-sectional view taken on line 6-5 ofFigure 1, looking in the direction of the arrows and illustrating thelock- 5 ing bolt in its retracted position and further showing the keyengaging portions for being engaged by the wings of the operating key;

Figure 7 is a vertical cross-sectional view taken on line 'l-'l ofFigure 1, looking in the direction of the arrows, illustrating themanner of holding one of the locking bolt catches out of its lockedposition, with an opening formed in the bolt;

Figure 8 is a similar view illustrating the looking bolt catch in itslocked position and showing the wedge shaped member operated by the knobtumbler for retaining the bolt catch in its locked position; v

Figure 9 'is an exploded side elevational view of the locking bolt; 20

Figure 10 is a side elevational view of the operating key illustratingthe wings thereon for engaging the locking bolt and the looking bolttumbler; and

Figure 11 is a top plan view of the entire lock illustrating the coverthereon and showing the latch knob and key-hole opening for operatingthe latch bolt and locking bolt.

In the drawings, wherein for the purpose of illustrating the inventionand wherein like reierence characters will be employed to designate likeparts throughout the same, the reference character 5 will generally beemployed to designate a lock casing having a cover 6 held in place by ascrew I received in a threaded opening formed in a boss 8 carried by thebottom wall of the casing.

One end of the lock casing 5 is provided with rectangular openings 9,I0, and H through which projects a sliding latch bolt l2, a locking boltI3, and a night latch bolt l4 respectively.

The latch bolt I2 is provided with an enlarged portion l5 having a slotl6 for receiving a portion of a projecting spring l8. One end of thespring I8 is anchored in a boss I9 as at 20 while the free end 2| isreceived in an opening 22 formed in one end of the locking bolt 13. Thelatch bolt 12 is guided by means of a guide loop 23 and said latch boltI2 is provided with an extension 24 having 0 an upturned end 25 forminga pin adapted to be received in an opening 26 formed in the free end ofan arcuately curved wing 21 integral with a circular boss 28 formed on aspindle 29 having a squared end 30 capable of receiving a correspondure11.

Formed in the locking bolt l3 are aligned slots 32 and 33 for receivingthe respective guide pins 34 and 35 suitably carried by the lock casing5. An additional guide in the form of a loop 36 is provided for thelocking bolt 13 and said guide 35 is secured or anchored to the casing5. Formed integral with one end of the guide loop 36 is a boss 31 havinga bore 38 through which extends a locking pin 39. One end of the lock-Ving pin 39 is bent angularly as at 49 and is received in a loop 4!formed integral with the circular boss 23 whereby turning movement ofthe spindle 29 will eifect the retracting of the bolt [2 as well as thevertical movement of the locking pin 39.

The loop spring 42 is mounted in one end of the casing 5 and has itsends anchored thereto by means of screws or bolts 43. Guide pins 44 areprovided for the spring 42 and are also secured to the lock casing 5.The spring 42 is adapted to engage the locking bolt l3 and normallyproject the same through the opening l9 whereby said bolt will normallyassume a locked position. In addition to the locking bolt projectingspring 42, there is provided a retracting spring 45 which is smallerthan the spring 42 and of less tension strength. One end of the spring45 is anchored to the lock casing as at 46 while the opposite end isfree as at 41 to be received within a cut-out portion 48 formed in oneof the longitudinal edges of the locking bolt l3. V

Bosses 49 are formed in the lock casing and have internal screw threads50 for receiving screws 5! after the cover 52 has been placed inposition to completely cover the projecting spring 42.

Formed in the lock casing 5 is a cut-out portion 53 having a reducedconnecting portion 54. Mounted above the reduced portions 53 and 54 is aspring member 55 anchored to the lock casing as at 56 so that the freeend 51 may move freely within the reduced cut-out portion 54. Formed onthe free end of the spring member 55 is a pin 58 and also formed on theenlarged portion of the spring member 55 adjacent the anchoring point isa key receiving pin 59. The free end of the spring member 51 is adaptedto underlie the looking bolt l3 whereby the pin 58 may engage within anopening 69 formed in the underside of the locking bolt as clearly shownin Figures 1, 2, 3, '7 and 8, when said bolt is in its projectedposition.

Formed at one end of the locking bolt I3 is a pair of notches 6i and 62forming a key engaging wing 83 as clearly shown in Figure 9. The notchesBI and 62 are cut-away as at 64 and 65 respectively for engagement by acut away portion 65 formed in the wing 61 of a key69. The projection 1|engages the reduced portions 64 and 55 of the notches El and 62 whilethe extension 68 is adapted to trip a bolt locking tumbler which will behereinafter more fully described.

As clearly shown in Figures 1, 2, 3 and 4, also 7 and 8, the locking pin39 associated with the spring arm 55 has its free end bevelled as at 1|that is adapted to be slid under the free end of the spring member 55 ormay be moved over top of the spring member 55 to retain the pin 58 in orout of engagement with the opening 89 formed in the locking bolt l3.Obviously, an inward pressure upon the key 69 will force the springmember 55 into the seat 54 formed in the casing and will thereby movethe pin 58 out of engage- 2,028,672 ingly shaped socket in the knob 3 I,shown in Figment with the opening 69 providing the latch operated rod 39has not been moved to position the wedge shaped end 1| under the freeend of the spring member 55. When the rod 39 has been manipulated so asto move the wedged portion H under the free end 51 of the spring member55, it is impossible to retract the bolt l3 by operating the key untilthe shaft 29 has been rotated to withdraw the wedged end 1| from underthe free end 51 of the spring member 55. Upon slight pressure exertedinwardly upon the key, the free end 51 will be flexed with the resultantdisplacement of the pin 58 from the opening 69.

In addition to the bolt locking pin 58 there is provided a key operatedtumbler 12 pivoted to the lock casing by means of a machine screw 13.The pivoted end of the tumbler 12 is provided with an enlarged boss 14to allow the tumbler 12 to extendbelow the guard 35 and above thesliding pin 39. Formed on the tumbler 12 is a cam portion 15 adapted tobe engaged by a pivoted striker arm 19 also pivotally secured to thecasing by means of a machine screw 11. The free swinging end of thestriker arm 15 is arcuately curved and is presented to the cam face 15formed on the tumbler 12 so that as the extension 68 of the key 69engages the arcuately curved portion 16 the tumbler 12 will be raisedvertically. Formed on the free end of the tumbler 12 is an extension 18terminating in a hooked end 19 adapted to be selectively received inopenings 80 and 8| formed in the locking bolt 13.

It-Will be obvious that when the key 69 is turned in the lock towithdraw the bolt l3 after the latch handle 3| has been turned to movethe sliding bar 39 upwardly, the tumbler 12 will be simultaneouslyraised to disengage the notched end '19 from the opening 80. When thebolt 13 has been retracted the tumbler 12 is again dropped so thatthehook end 19 engages in the opening 8| thereby holding the bolt in aretracted position.

A fiat leaf spring 83 has one of its ends as at 84 anchored in a portionof the guide loop 36 while its intermediate end is supported as at 85 ina struck-up portion formed on the side wall of the lock casing 5. Thefree end of the leaf spring 83 is presented to the hooked end of thetumbler 12 as at 86.

A night latch bolt i4 is guided in the opening II and is further guidedby means of a strap 81 secured to the lock casing and it will be notedthat one end of the night latch bolt 14 is notched as at 88 so that itmay be dropped downwardly as shown in Figures 3 and 4 to retain the boltin its projected position. A knob 89 is connected to the night latchbolt 14 by means of an extension 99 and is adapted to operate in a slot9| formed in the lower edge of the lock casing 5.

When the lock parts are in their positions shown in Figure 1, the boltl3 may be retracted and projected by means of the key withoutnecessitating pushing upon the key to flex the spring arm 51 as it willbe noted that the slide rod 39 is positioned above the arm 51 therebynormally holding the pin 58 out of engagement with the opening 69 in thelocking bolt I 3. By merely inserting the key in the lock and turningthe same, the tumbler 12 may be raised to allow the projection of thebolt under the tension of the spring 42. As shown in Figure 2, the boltI3 is partially projected and by turning the key 59 three hundred andsixty degrees (360) the bolt may be projected to its fullest extent asshown in Figure 3.

After the bolt has been projected, the latch l2 may be retracted toraise the sliding pin 39 so that the pin 58 will spring into the opening60 formed in the bolt and retain the same in its projected position. Byreleasing the latch knob 3|, the spring 58 will cause the projection ofthe latch bolt l2 thereby returning the sliding pin 39 under the springarm 51 and prevent the retraction of the bolt !3 by manipulation of thekey 69 unless the latch handle 3| is operated to withdraw the slidingpin 39 whereupon the wedge end II will be moved out of the path of thespring arm 51 and again allow the retraction of the bolt I3 by therotation of the key 69 in addition to an inward pressurethereon-sufficient to flex the spring arm 55 and cause the release ofthe pin 58 from the opening 66.

In Figure 4 is shown quite clearly the manner in which the sliding pin39 may be moved to cause the wedge-shaped end H to engage under thespring arm 5'! and force the pin 58 into the opening 60 when the bolt i3is in its fully projected position.

A spring 32 has one of its ends as at 93 secured to the lock casingwhile the free end as at 94 is presented to the night latch bolt M tonormally force the same downwardly and to urge the notch '88 intoengagement with the bottom portion 01' the guide loop 81.

It is to be understood that the form of the invention herewith shown anddescribed is to be taken as a preferred embodiment of the same and thatvarious changes in the shape, size and arrangement of parts may beresorted to without departing from the spirit and scope of the inventionas claimed.

I claim:

A look structure comprising a casing, a key operated bolt slidablymounted in the casing and having an opening therein inwardly of itsedges, a spring for normally holding the bolt projected, the casinghaving a recess formed in the interior wall thereof beneath the bolt, aspring arm mounted over the recess having one end presented to thesliding bolt, a key stud mounted on the spring arm laterally of the boltand adapted to receive a key for the operation of the bolt, a pinmounted on the free end of the arm adapted to enter the opening in thebolt, and said key stud adapted to be depressed by the bolt operated keyfor moving the spring arm into the recess to permitretraction of thebolt from its locked position against the tension of the spring.

JOHN 'KUBINA.

